CVE-2026-10090

{"id": "CVE-2026-10090", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-10090", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-08-05T13:49:40.960456Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "secalert@redhat.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.0, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:L", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 2.3}]}, "affected": [{"source": "secalert@redhat.com", "affectedData": [{"cpes": ["cpe:/a:redhat:acm:2.11::el9"], "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.11", "versions": [{"status": "unaffected", "version": "1787263584", "lessThan": "*", "versionType": "rpm"}], "packageName": "rhacm2/multicluster-operators-subscription-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:acm:2.13::el9"], "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.13", "versions": [{"status": "unaffected", "version": "1787263693", "lessThan": "*", "versionType": "rpm"}], "packageName": "rhacm2/multicluster-operators-subscription-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:acm:2.14::el9"], "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.14", "versions": [{"status": "unaffected", "version": "1787170830", "lessThan": "*", "versionType": "rpm"}], "packageName": "rhacm2/multicluster-operators-subscription-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:acm:2.15::el9"], "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.15", "versions": [{"status": "unaffected", "version": "1787240030", "lessThan": "*", "versionType": "rpm"}], "packageName": "rhacm2/multicluster-operators-subscription-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:acm:2.16::el9"], "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.16", "versions": [{"status": "unaffected", "version": "1787242321", "lessThan": "*", "versionType": "rpm"}], "packageName": "rhacm2/multicluster-operators-subscription-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}, {"cpes": ["cpe:/a:redhat:acm:2.17::el9"], "vendor": "Red Hat", "product": "Red Hat Advanced Cluster Management for Kubernetes 2.17", "versions": [{"status": "unaffected", "version": "1787242108", "lessThan": "*", "versionType": "rpm"}], "packageName": "rhacm2/multicluster-operators-subscription-rhel9", "collectionURL": "https://catalog.redhat.com/software/containers/", "defaultStatus": "affected"}]}], "published": "2026-08-05T09:18:14.667", "references": [{"url": "https://access.redhat.com/errata/RHSA-2026:60386", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:60387", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:60388", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:60389", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:60390", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/errata/RHSA-2026:60391", "source": "secalert@redhat.com"}, {"url": "https://access.redhat.com/security/cve/CVE-2026-10090", "source": "secalert@redhat.com"}, {"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2483292", "source": "secalert@redhat.com"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "secalert@redhat.com", "description": [{"lang": "en", "value": "CWE-267"}]}], "descriptions": [{"lang": "en", "value": "A flaw was found in the Application Subscription controller (multicluster-operators-subscription) of Red Hat Advanced Cluster Management for Kubernetes (ACM). A user with namespace-scoped \"edit\" privileges in an ACM hub namespace can create a Channel resource pointing to a Helm repository they control and a Subscription resource referencing it. The app-subscription controller fetches and applies the Helm chart contents with its own elevated authority, without verifying whether the subscription creator holds the \"open-cluster-management:subscription-admin\" role and without restricting applied resources to the subscription namespace. This allows the attacker to include cluster-scoped resources in the Helm chart, such as a ClusterRoleBinding granting the attacker's ServiceAccount the \"cluster-admin\" ClusterRole. Successful exploitation results in full cluster-admin privilege escalation. This contradicts the ACM documentation which states that non-subscription-admin users should have resources deployed into the subscription namespace only."}], "lastModified": "2026-09-08T14:17:20.337", "sourceIdentifier": "secalert@redhat.com"}